:root {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
  line-height: 1.5;
  font-weight: 400;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* 使用细的滚动条 */
  scrollbar-width: thin;
  /* 背景色 */
  --app-bg-color: #273a4a;
}
html.dark {
  background: var(--app-bg-color);
}

body {
  margin: 0;
  padding: 0;
  display: flex;
  place-items: center;
}

#app {
  height: 100vh;
  width: 100%;
  min-height: 300px;
  min-width: 500px;
  display: flex;
  flex-direction: column;
  margin: 0 auto;
  padding: 0;
  text-align: center;
  overflow: hidden;
}
